Spend on mobile marketing is expected to nearly quadruple in the next five years according to a study by Forrester. Here are the projected marketing spend on mobiles in the oncoming years:

2009 : $391 million
2010 : $561 million
2011 : $748 million
2012 : $950 million
2013 : $1131 million
2014 : $1274 million

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